NEW YORK, NY - JULY 18: A man rests along the the Coney Island boardwalk on one of the hottest weeks in recent New York City history on July 18, 2013 in New York City. With daily temperatures in the high 90's and with the heat index making it feel in the triple digits, many New Yorkers are doing what they can to stay cool. A break from the heatwave is not expected until Saturday evening at the earliest. (Photo by Spencer Platt/Getty Images) less

NEW YORK, NY - JULY 18: A man rests along the the Coney Island boardwalk on one of the hottest weeks in recent New York City history on July 18, 2013 in New York City. With daily temperatures in the high 90's ... more

Photo: Spencer Platt, Getty Images

NEW YORK, NY - JULY 18: A man rests along the the Coney Island... Photo-4934261.66637 - SFGate

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Natalie Koch lights a candle for Judy Hoard, of Centuria, during a vigil for two year-old Isaiah Theis, Thursday, July 18, 2013 in Centuria, Wis. Two-year-old Isaiah Theis disappeared Tuesday night. A Polk County sheriff's deputy found his body about 10:15 p.m. Wednesday in the trunk of a locked car parked outside the boy's home where his father repairs cars when the owner came to retrieve it. (AP Photo/The Star Tribune, Kyndell Harkness) less

Natalie Koch lights a candle for Judy Hoard, of Centuria, during a vigil for two year-old Isaiah Theis, Thursday, July 18, 2013 in Centuria, Wis. Two-year-old Isaiah Theis disappeared Tuesday night. A Polk ... more

BROOKFIELD, IL - JULY 18: Hudson, a polar bear, cools down by playing with a block of ice during a swim in his enclosure at Brookfield Zoo on July 18, 2013 in Brookfield, Illinois. A heat wave continues to grip much of the country today with temperatures expected to top 90 degrees in forty-seven states. (Photo by Scott Olson/Getty Images) less

BROOKFIELD, IL - JULY 18: Hudson, a polar bear, cools down by playing with a block of ice during a swim in his enclosure at Brookfield Zoo on July 18, 2013 in Brookfield, Illinois. A heat wave continues to ... more

Lynn and Laura, 3, Ramnanan of Atlanta, walk up to an upper deck on the Pinta replica ship during a visit with family Thursday, July 18, 2013, at Levee Park in Winona, Minn. The Pinta and Nina ships will be docked in Winona for visitors through Wednesday, July 24. (AP Photo/Winona Daily News, Andrew Link) less

Lynn and Laura, 3, Ramnanan of Atlanta, walk up to an upper deck on the Pinta replica ship during a visit with family Thursday, July 18, 2013, at Levee Park in Winona, Minn. The Pinta and Nina ships will be ... more

This July 17, 2013 image provided by Meagan Greene shows wildfire smoke near Idyllwild, Calif. The blaze about 100 miles east of Los Angeles had grown to more than 35 square miles in size and had destroyed at least six houses and mobile homes. Tensions heightened late Wednesday after winds shifted, causing the fire to change course and head in the direction of Idyllwild, an artist community and hiking destination in the San Jacinto Mountains.(AP Photo/Meagan Greene) less

This July 17, 2013 image provided by Meagan Greene shows wildfire smoke near Idyllwild, Calif. The blaze about 100 miles east of Los Angeles had grown to more than 35 square miles in size and had destroyed at ... more

IDYLLWILD, CA - JULY 18: A pickup is shown in the wake of the Mountian Fire after it scorched the area on July 18, 2013 near Idyllwild, California. The massive wildfire in Riverside county has grown to 23,000 acres and is advancing towards the mountain town of Idyllwild on one front and city of Palm Springs on the other front destroying several homs and forcing the evacuation of 6,000 people. (Photo by Kevork Djansezian/Getty Images) less

IDYLLWILD, CA - JULY 18: A pickup is shown in the wake of the Mountian Fire after it scorched the area on July 18, 2013 near Idyllwild, California. The massive wildfire in Riverside county has grown to 23,000 ... more

Photo: Kevork Djansezian, Getty Images

IDYLLWILD, CA - JULY 18: A pickup is shown in the wake of the... Photo-4934263.66637 - SFGate

Cody Tracy slides down onto his steer before taking it down in a time of 9.2 seconds in the steer wrestling event Thursday, July 18, 2013, at the 29th annual Benton Rodeo Association Frontier Days Celebration, Championship Rodeo and Bull-A-Rara in Benton Pa. (AP Photo/Bloomsburg Press Enterprise, Jimmy May) less

Cody Tracy slides down onto his steer before taking it down in a time of 9.2 seconds in the steer wrestling event Thursday, July 18, 2013, at the 29th annual Benton Rodeo Association Frontier Days Celebration, ... more

Photo: Jimmy May, Associated Press

Cody Tracy slides down onto his steer before taking it down in a... Photo-4934266.66637 - SFGate

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A Stormtrooper makes his way through the crowd during Day 2 of Comic-Con International on Thursday, July 18, 2013 in San Diego, Calif. (Photo by Chris Pizzello/Invision/AP)

A Stormtrooper makes his way through the crowd during Day 2 of Comic-Con International on Thursday, July 18, 2013 in San Diego, Calif. (Photo by Chris Pizzello/Invision/AP)

Photo: Chris Pizzello, Associated Press

A Stormtrooper makes his way through the crowd during Day 2 of... Photo-4934268.66637 - SFGate